Malicious PDF — malware analysis report

Static analysis result for SHA-256 7212b3f60dbc8e71…

MALICIOUS

PDF

44.8 KB Created: 2021-06-10 14:41:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b91a678c1dc218017ea2dcf1a85fc776 SHA-1: da91a002cbcc89bf49b3be29d00ae521f7519b56 SHA-256: 7212b3f60dbc8e718788d91335dd4226513140ea9e465226ba30312c4544a494
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and websites, masquerading as game hacks or generators. The document body and embedded links suggest a lure to download further malicious content, likely other PDFs or executables, from domains like shiny-nn.ru. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.tw/app/431946152/roblox-free-troll-outfits-game-hack In PDF document text
    • http://shiny-nn.ru/images/roblox-got-talent-piano-hacks_GM431946152.pdfIn PDF document text
    • http://shiny-nn.ru/images/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://shiny-nn.ru/images/google-play-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://shiny-nn.ru/images/can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://shiny-nn.ru/images/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://shiny-nn.ru/images/pokemon-go-free-trades_GM1094591345.pdfIn PDF document text
    • http://shiny-nn.ru/images/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://shiny-nn.ru/images/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://shiny-nn.ru/images/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://shiny-nn.ru/images/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://shiny-nn.ru/images/mcpe-com_GM479516143.pdfIn PDF document text
    • http://shiny-nn.ru/images/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://shiny-nn.ru/images/hack-engine-on-roblox_GM431946152.pdfIn PDF document text
    • http://shiny-nn.ru/images/free-robux-real-generator_GM431946152.pdfIn PDF document text
    • http://shiny-nn.ru/images/free-minecraft-bedrock-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://shiny-nn.ru/images/online-hacking-tricks-coin-master_GM406889139.pdfIn PDF document text
    • http://shiny-nn.ru/images/roblox-hack-ios_GM431946152.pdfIn PDF document text
    • http://shiny-nn.ru/images/mob-buster-robux-hack_GM431946152.pdfIn PDF document text
    • http://shiny-nn.ru/images/coin-master-spin-and-coins-free_GM406889139.pdfIn PDF document text
    • http://shiny-nn.ru/images/spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004fcc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FCC 26248 bytes
SHA-256: 5c216a26f147f51da40bbb4543964e3f816f7e0d75faaa550d8ab2cff4ccb1e2
font_01_sfnt_off00008c75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C75 18312 bytes
SHA-256: fe777fd970e5ee6fc37b7e0597b2652638bbcae3cf084ec195e6118a95705f96

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